I was once (long ago) sick on Monday and my employer called me and told me that I should be able to come to work when I was able to play World of Warcraft on Sunday, because he looked my character up in the armory and saw me getting a boss kill or something.
I was sick, because I had my wisdom teeth removed on Monday morning....
People can get in all kinds of trouble because of their gaming habits. A game critical of religion or religious, a game about sexuality and/or gender, a political game about dictatorship or capitalism or unionizing. A historical game about something your country doesn't want you to know or a game that mentions Tian'anmen and Winnie-Puh. A game from a Russian developer that fled Russia when the war against Ukraine started and you are a gamer in Russia who wants to play it.
Good if Steam allows more control over our privacy, it took them long enough.
told me that I should be able to come to work when I was able to play World of Warcraft
From your name I assume you are German. In that case your employer could suck it, even if you played on Monday. You can do whatever the fuck you want if it doesn't conflict with you getting better. So if the doctor advises to stay in bed and sleep and you run around town for fun you could rightfully get in trouble. But if you have a broken leg you might not be fit for (your particular) work but could of course still play computer games. If you are on sick leave for mental problems you could even go on vacation because that might even benefit your mental health.
go a step further who cares if hes out and about while sick your employer has you for the time youre working no more and usually less. the employer can suck a dick, your situation is probably different but if my boss was like "yo i see u gaming come to work", id quit on the spot.
always work the quality of your wage and remember that you arent paid enough.